For straight holes, bow spring centralizers are sufficient and commonly used.

对于直井，弓型弹簧扶正器足以满足上述功能，并被通常使用。

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The cutting holes layout for straight cutting has been optimized.

对直线掏槽的炮孔布置进行了优化设计。

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Evaluation of formation drill-ability anisotropy has important effect for preventing deviation of straight holes and planning drilling trajectories of directional Wells.

地层可钻性各向异性评价在直井防斜以及定向井井眼轨迹控制中具有重要的意义。

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Day was in the lead for most of the day, going 18 straight holes without a bogey until he missed short par putts on the last two holes.

NPR: Snedeker, Cabrera Tied For Lead At Masters